Patent US2687720A successfully refreshed from Google Patents.
US3590280A
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Variable multiphase clock system
Assignee: Westinghouse Electric Corp
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Filing: 1969-11-18
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Granted: 1971-06-29
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Expires: 1989-11-18
Abstract
Abstract A multiphase clock system operated from a master clock oscillator which is capable of providing a plurality of clock signals having remotely controllable variable pulsewidths as well as mutually variable phase shifts utilizing J-K flip-flop integrated circuit components of the emitter coupled current mode logic type in combination with field effect transistors of the MOSFET type which are operated as voltage controlled variable resistances and suitable timing capacitors for transforming integrated circuit J-K flip-flops into monostable multivibrators. The invention herein described was made in the course of contract with the Department of the Army under contract No. DAAB03-67-A-0010.
Inventors
- 👤 James R Hudson
- 👤 John C Spann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/15; H03K5/15013; H03K5/1506; H03K5/15086; G; G06; G06F; G06F1/00; G06F1/04; G06F1/06; H03K5/15006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
The invention as defined by claim 1 wherein said multivibrator circuit of said first and second one shot multivibrator is comprised of a J-K flip-flop circuit including J and K input terminals, Q and Q output terminals and a reset terminal and wherein said resistance-capacitance feedback network coupled across said pair of output terminals is coupled across said Q and Q terminals and said common connection therebetween is coupled to said reset terminal.
Claim 2
Dependent Claim
46 words
The invention as defined by claim 2 wherein said voltage variable resistance comprises a field effect device having an input electrode and a pair of output electrodes and wherein said pair of output electrodes are coupled between said Q or Q terminal and said common connection.
Claim 3
Dependent Claim
14 words
The invention as defined by claim 3 wherein said capacitance comprises a fixed capacitor.
Claim 4
Dependent Claim
38 words
The invention as defined by claim 3 wherein said field effect device comprises a field effect transistor and wherein said input electrode comprises a gate and said pair of output electrodes comprises the source and drain electrodes, respectively.
Claim 5
Dependent Claim
20 words
The invention as defined by claim 5 wherein said field effect transistor comprises a metal oxide silicon field effect transistor.
Claim 6
Dependent Claim
23 words
The invention as defined by claim 6 and additionally including a resistance-capacitance filter circuit coupled between said remote source and said gate electrode.
Claim 7
Dependent Claim
23 words
The invention as defined by claim 1 and additionally including a filter circuit coupled between said remote source and said voltage variable resistance.
Claim 8
Dependent Claim
60 words
The invention as dEfined by claim 1 wherein said flip-flop circuit comprises a J-K flip-flop circuit including J and K input terminals Q and Q output terminals and wherein said first input terminal comprises the J input terminal and the second input terminal comprises the K input terminal and wherein said at least one output terminal comprises the Q terminal.
Claim 9
Dependent Claim
43 words
The invention as defined by claim 1 wherein said multivibrator circuit of said first and second one-shot multivibrator and said flip-flop circuit are comprised of J-K flip-flop circuits and said voltage variable resistance comprises the drain-source resistance of a MOS field effect transistor.
References Cited (Backward Citations)
US3067343A
Cited
US3317843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |